Abstract
Abstract Quantum secure direct communication (QSDC) enables the direct transmission of secret messages without prior sharing of keys among the communicating parties. However, in practical situations, an eavesdropper can compromise the measurement device and potentially steal secret messages. To enhance the reliability of QSDC systems, measurement-device-independent (MDI) QSDC protocols have been developed. In this paper, we propose a high-capacity MDI-QSDC protocol with authentication by utilizing hyperentangled Bell states. The protocol allows the sender to transmit six classical bit messages to the receiver using one quantum state. Our protocol has a higher coding capacity compared to other MDI-QSDC protocols. Additionally, we achieve mutual authentication of the identities of the communicating parties, and our scheme has significant advantages over the traditional QSDC protocols, where the legitimacy of the communicating parties has to be assumed. Theoretical analysis proves that our protocol can effectively defend against common attacks.
Published Version
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